Wrench



(NoKodeL) v J. A. BARKER.

WRENCH.

No.574,513 Patented Jan.5-,1897.

v If Ell 15 11 z UNITED STATES PATENT" OFFICE.

JOHN A. BARKER, OF LA CANADA, CALIFORNIA.

' WRENCH.

SPECIFICATION forming part of LettersPatent No. 574,513, dated January5, 1897.

Application filed March 30, 1896- Serial No. 585,436. (No model.)

To all whom, it may concern.-

Be it known that I, JOHN A. BARKER, a citizen of the United States, anda resident of La Canada, in the county of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements in\Vrenches, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, whichform a part of this specification.

My invention relates to improvements in wrenches, intended moreespecially for a pi pewrench, but which will also perform all thefunctions of the ordinary monkey-wrench; and my invention consists incertain features of novelty hereinafter described and claimed.

Figure I represents a side elevation of my improved wrench, showing itin position to grip a pipe. Fig. II represents aside elevation of themovable jaw and its shank detached. Fig. III is a longitudinal sectiontaken on lines III III, Figs. I and VI. Fig. IV is a rear elevation ofthe movable jaw detached. Fig. V is a rear view of the entire wrench.Fig. VI is a side elevation showing the position of the movable jaw whena grip has been taken upon a pipe.

Referring to the drawings, 1 represents the main stem of the wrench,which is provided with a threaded portion 2.

3 represents a handle on one end of the stem, and 4 a fixed jaw on theopposite end. The jaw 4 is preferably provided with serrations 5.

6 represents a movable jaw adapted to slide on the stem 1, and having ashank 7, consisting of two members 8, which extend for some distance oneach side of the stem 1, said members 8 terminating on the front side ofthe outer end in the movable jaw 6 and having their rear edges connectedby an integral plate 9, which extends over the rear edge of the stem 1,thus forming a guide for the outer end of the shank and for the movablejaw.

10 represents an internal threaded sleeve adapted to travel on thethreaded portion 2 of the stem 1. The sleeve 10 is provided near itsouter end with an internal annular groove 11, into which lugs 12 on theouter side of the shank members 8 extend, said lugs being inserted inthe annular groove before the stem 1 is placed in position, the lugshaving convex outer faces, as shown at 12, in order to permit themovable jaw to rock, the stem preventing the inner ends of the members 8from springing inward, thus holdingthe members in movable contact withthe sleeve.

To prevent too great a thrust upon the lugs 12, I provide shoulders 13on the outer faces of the members 8, which abut against the outer end ofthe sleeve and sustain a large portion of the thrust when the wrench isbeing used. The shoulders 13 are provided with curved faces 14 wherethey abut against the sleeve, so as to permit the rocking movement ofthe movable jaw. The face of the movable jawis preferablyprovided withserrations 15.

16 represents the outline of a pipe, showing application of the wrench.In operation, when it is desired to use the wrench as a pipe-wrench, thejaws are set as shown in Fig. I, with the jaws resting against oppositesides of the pipe. Then as forward pressure is exerted upon the handleof the wrench the movable jaw 6 rocks backward, as shown in dottedlines, Fig. VI, said move ment forcing a portion of the movable jaw totravel nearer the fixed jaw, with the result that the jaws bite into thepipe and perform the function of rotating or holding the same, as thecase may be.

My wrench is also adapted to be used as an ordinary monkey-wrench, therocking movement of the movable jaw not taking place when the jaws areadjusted to a square nut.

I claim as my invention 1. In a wrench the combination, of a main stemhaving a screw-threaded portion, a jaw fixed to the stem, a movable jawloosely connected with the stem at its outer end so as to permit of arocking movement, an internal screw threaded sleeve mounted upon thestem and having an internal annular groove, shanks on the movable jawand lugs on the shanks adapted to engage in the groove in the sleeve,substantially as set forth.

2. In a wrench the combination, of a main stem, having a screw threadedportion, a threaded sleeve mounted upon the stem, a jaw fixed to thestem, a movable rocking jaw mounted upon the stem, a two-part shankconnecting the movable jaw with the sleeve, and having an interveningspace between the members of the shank for the reception of the mainstem, substantially as set forth.

3. 111 a wrench the combination, of a main stem having a screw threadedportion, a threaded sleeve mounted upon the stem, a jaw fixed to thestem, a movable rocking jaw mounted upon the stem, a two-part shankconnecting the movable jaw with the sleeve and a plate connecting therear portion of the members of the two-part shank with each other,substantially as set forth.

4. In a wrench the combination, of a main stem having a screwthreadedportion, a threaded sleeve mounted upon the stem, a jaw fixed to thestem, a movable rocking jaw mounted upon the stem, a two-part shankconnecting the movable jaw with the sleeve and shoulders upon the shankwhich abut against the end of the sleeve, substantially as set forth.

JOHN A. BARKER. \Y itnesses:

JAS. E. KNIGHT, I. HERRINGTON.

